I think I found my problem. Pin 4 on 9 pin connector on the datalog unit needs a voltage on it to datalog. I'm using a straight 9 pin cable(pin 1=pin1 etc pin9=pin9) pin 4 from the datalog unit goes to pin 4 on megasquirt unit which is connected to pin 6 in the megasquirt unitback to pin 6 on the datalog unit which does not go anywere. Is it ok to tie pin 4 to pin 8 (datalog unit)to get the unit to work.

904svo wrote:I think I found my problem. Pin 4 on 9 pin connector on the datalog unit needs a voltage on it to datalog. I'm using a straight 9 pin cable(pin 1=pin1 etc pin9=pin9) pin 4 from the datalog unit goes to pin 4 on megasquirt unit which is connected to pin 6 in the megasquirt unitback to pin 6 on the datalog unit which does not go anywere. Is it ok to tie pin 4 to pin 8 (datalog unit)to get the unit to work.

Pin 4 is only used to reset the Propeller when updating the EEPROM from your PC. It is not used for data logging. You might try flipping switch SW4. This will swap pins 2 and 3 on the 9 pin connector. Also make sure dip switch_2 is set to match your Megasquirt baud rate ----> on = 9600, off = 115200 baud. Pin 8 is not connected.

904svo wrote:I think I found my problem. Pin 4 on 9 pin connector on the data log unit needs a voltage on it to data log. I'm using a straight 9 pin cable(pin 1=pin1 etc pin9=pin9) pin 4 from the data log unit goes to pin 4 on megasquirt unit which is connected to pin 6 in the megasquirt unitback to pin 6 on the data log unit which does not go anywere. Is it OK to tie pin 4 to pin 8 (data log unit)to get the unit to work.

Pin 4 is only used to reset the Propeller when updating the EEPROM from your PC. It is not used for data logging. You might try flipping switch SW4. This will swap pins 2 and 3 on the 9 pin connector. Also make sure dip switch_2 is set to match your Mega squirt baud rate ----> on = 9600, off = 115200 baud. Pin 8 is not connected.

Huey

I try all those things , switch 2 set set 1=on (logging mode) set 2=on (9600 baud) set 3=on (auto logging), if I reverse s4 led 3 does not come on and does not create the *.frd file. If I set it back it creates the *.frd file but only has a header data in it. If I loop pin 4 to 8 this causesthe mega squirt to transmit the data and fulls out the *frd file with data. With out it connected the mega squirt unit does not transmit any data. You shipped me version 1.2 circuit board with the chip program. I hope this will help you.

Okay, so we know the serial connection is working try setting your read delay to 5ms. Also I noticed your mark button is pressed in your screen shot??? I don't understand why pin 4 needs to be connected to pin 8. What version of the Megasquirt PCB do you have V2.2, V3? If you connect a PC to your Megasquirt and type "S" what is returned from the Megasquirt?

Pretty sure I found my problem switch K2 was out of stock, so I replace it with a DPDT switch from Radio Shack. After check Digi-Keypart number the switch is SPDT/center off. I got another switch which meets these requirement from Radio Shack.Now what is the operation of the K2 switch between M ,L and center to data log the information?

More information with autologging set on , I can see the data stream out on the Microsquirt unit on pin 40n (PBX32A), Led_3 is flashingif I move switch 2 to M led_2 flashes on then off. The unit does not create a *frd file on my scan disk althought it does create the MEGALOGfolder. any ideas on what the problem is.

IT WORKS GREAT. The problems I had were my fault!!The problems were I had the wrong type SW2 switch installed and after reading Huey post over and over. I was not leaving the power on the data logger unit, the unit starts to writes the data after the mega-squirt is turn on and stops after the mega-squirt stops transmitting data which will write to *.frd file on the USB thumb drive. Switch 2 is not used and is left in the middle position, if dip switch 3 is set to the auto logging on feature. Just plug in the USB thumb drive and it ready to record data from the mega squirt unit.

The inc files would have to reside on the USB stick to convert temperature.I'm thinking it would be about a $30.00 upgrade that included the hardware and software and could be soldered into the expansion slot.